不同补光时间对日光温室甜瓜生长发育的影响

试验以LED植物生长灯为补光材料，采用单因素完全随机区组实验设计进行，研究不同补光时间对温室甜瓜生长发育的影响。结果表明：在整个生育期的补光试验中，补光1 h维生素C含量最高；补光3 h对株高和果实纵向生长促进效果最大，可溶性固形物含量最高；5 h对茎粗、植株干鲜质量影响最大，可溶性糖含量和糖酸比最高；补光7 h产量最大。苗期补光7 h、伸蔓期5 h、结果期1 h时甜瓜长势、品质及产量最优。

Effect of different duration of supplemental illumination on growth of melon in sunlight greenhouse

LED plant growth lights were used as supplemental illumination material in this study. The effect of different duration of supplemental illumination on the growth of melon was investigated by using a single factor of completely randomized block experimental design. The results showed that in the whole growth period of the test， the VC content was the highest in the treatment of supplemental illumination for 1 hour; the plant height and fruit longitudinal growth were greatly promoted with the highest soluble solid content in the treatment of supplemental illumination for 3 hours; after supplemental illumination for 5 hours， the stem diameter was promoted， the plant fresh and dry weight were significantly affected， soluble sugar content and sugar acid ratio were the highest; the yield was the highest in the treatment of supplemental illumination for 7 hours. When the light was added for 7 hours at seedling stage， 5 hours at the vine elongation stage， and 1 hour at fruiting stage， the growth and quality of melon was the best.